Her looking glass

Cassandra Casscade is a young girl who accidentally opens a portal on her looking mirror. That night, Cassandra still remembers how her so-called family lied to her. She figures out that her fake family wants something from her or is stopping her from doing something. That rainy night she ran away from her 'so-called family' and discovered a tiny little cottage house in the middle of the forest and found a book called The Villainess Looking Glass. She found it weird because her name is written at the back of the book and the book has nothing written on it except for some unknown person named Reus Villan' . What could it be? Do casscade fates change? Has she found where she belongs?